An Application of the Advanced Constitutive Equations in the Multi-layer Flow Modeling: the Influence of the Die Design on Interfacial Instabilities

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F05%3A63503749" target="_blank" >RIV/70883521:28110/05:63503749 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

An Application of the Advanced Constitutive Equations in the Multi-layer Flow Modeling: the Influence of the Die Design on Interfacial Instabilities

Original language description

Fully viscoelastic FEM together with flow visualization technique are employed to quantify the effect of the die design on the wave type of interfacial instabilities in coextrusion. It has been shown experimentally that the minor channel geometry has a strong impact on the wave type of interfacial instabilities and the results can be correlated through novel criteria called as Total Stress Difference (TSD), which takes in to account the bulk change of the total stress in normal as well as tangential direction with respect to the interface. It has also been shown that specific type of high stress area occurs around the interface at the end of the converging section. This total stress has been found to be non-monotonic along the interface and related forthe onset of zig-zag type of interfacial instabilities when the total stress achieved 200 kPa.

Czech name

Aplikace pokročilých konstitučních rovnic v oblasti modelování koextruzního toku s ohledem na meziplošné nestability.

Czech description

Plně viskoelastická metoda konečných prvků spolu s tokovou vizualizační celou byly použity ke kvantifikaci vlivu designu vytlačovací hlavy na meziplošné nestability. Bylo zjištěno, že geometrie vedlejšího tokového kanálu má největší vliv na stabilitu koextruzního toku a nástup vniku meziplošných nestabilit může být korelován s nově navrženou kriteriální hodnotou TSD.

Type

D - Article in proceedings

CEP classification

CD - Macromolecular chemistry

OECD FORD branch

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Project

<a href="/en/project/GA103%2F05%2F2311" target="_blank" >GA103/05/2311: Development of methematical models for description of complex fluids rheology</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2005

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

2005 TAPPI European PLACE Conference

ISBN

1-59510-088-1

ISSN

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e-ISSN

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Number of pages

13

Pages from-to

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Publisher name

TAPPI Press

Place of publication

Atlanta

Event location

Vienna, Austria

Event date

May 23, 2005

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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